WCF 16.6.
Notwithstanding, the persons of believers being accepted through Christ, their good works also are accepted in Him; (Eph. 1:6, 1 Pet. 2:5, Exod. 28:38, Gen. 4:4, Heb. 11:4) not as though they were in this life wholly unblameable and unreproveable in God’s sight; (Job 9:20, Ps. 143:2) but that He, looking upon them in His Son, is pleased to accept and reward that which is sincere, although accompanied with many weaknesses and imperfections. (Heb. 13:20–21, 2 Cor. 8:12, Heb. 6:10. Matt. 25:21, 23)